Police: A 19-year-old at a Trump rally got caught trying to steal a gun and kill the candidate

Republican U.S. presidential candidate Donald Trump speaks at a rally in Sparks, Nevada, October 29, 2015. Reuters/James Glover II LAS VEGAS (AP) — A federal officer says a man arrested at a Donald Trump rally in Las Vegas told authorities he tried to grab an officer's gun so he could kill the candidate.

A complaint filed Monday in U.S. District Court in Nevada charges Michael Steven Sandford with an act of violence on restricted grounds.

It cites a report by Special Agent Swierkowski, whose first name was not included, saying Sandford told officers he drove from California to kill Trump and went to a Las Vegas gun range the day before to learn to shoot.

Sandford later went to a Trump rally at the Treasure Island Casino and approached a Las Vegas police officer to say he wanted an autograph from Trump.

The report says Sandford was arrested after grabbing the handle of an officer's gun in an attempt to remove it.

It wasn't immediately clear if he had an attorney. Las Vegas police say Sandford is 19.